body {
    margin: 0;
    padding: 0;
    font-family: 'Open Sans', sans-serif;
    background-image: url("https://img.freepik.com/free-vector/flat-geometric-background_23-2148957201.jpg?size=626&ext=jpg");
    background-repeat: no-repeat;
    background-size: cover;
}
form {
    background-color: #C4FCEF;
    padding: 20px;
    margin: 50px auto;
    width: 400px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 5px;
    filter: opacity(65%);
}
h1 {
    text-align: center;
    color: #2193FA;
    margin-bottom: 20px;
}
label {
    display: block;
    margin-bottom: 10px;
    color: #666;
    font-size: 16px;
    font-weight: bold;
}
input {
    display: block;
    width: 95%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 16px;
    transition: border-color 0.3s ease-in-out;
}
input:focus {
    border-color: #3498db;
    outline: none;
}
.resgi {
    background-color: #3498db;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease-in-out;
    margin-left: 10px;
}
.resgi:hover {
    background-color: #2980b9;
}
.clear {
    background-color: #fff;
    color: #666;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    /* 光标 */
    transition: background-color 0.3s ease-in-out, color 0.3s ease-in-out;
    margin-left: 10px;
}
.clear:hover {
    background-color: #ccc;
    color: #fff;
}
.qudl{
     text-align: center;
     line-height: 40px;
     width: 50px;
     height: 40px;
     background:darkseagreen;
     position: absolute;
     top: 20px;
     right: 30px;
     color: whitesmoke;

}
.qudl a{
    text-decoration: none;
    color: whitesmoke;
}
.qudl a:hover{
    color: white;
}
